We want the plugin manager to support the -test option etc even if Qt Creator is not configured with WITH_TESTS, so 3rdparty plugins can still be built and tested with a released Qt Creator. But we do not want to export functions/classes that are only needed for Qt Creator tests in that case. When Qt Creator is configured with WITH_TESTS, the QtCreatorAPI adds the WITH_TESTS define, and we used the same define for the first case above, where we only want to add the -test option and corresponding API. Use a different define EXTENSIONSYSTEM_WITH_TESTOPTION for this. The EXTENSIONSYSTEM_TEST_EXPORT keeps checking the WITH_TESTS define. Amends e5a4fdaa1b65beb0ca257ef698f685303b867802 Change-Id: I547f1fa7413e3bc452f71ae920c310a05e0193ae Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>